Question

我正在尝试过滤并使用FX Tableview显示项目数。

有一些按钮和txt字段用于列出特定数据 here is

文字输入：过滤

清除按钮：此处的gettingenter代码默认值为

本月按钮：获取本月价值

数据选择器：获取任何一天的值

有一个标签用于显示表项目大小

public Label lblRecordSize;

我的问题; 我不想在每个动作下lblRecordSize.settext()进行过滤。是否有像tableview.onItemSizeChangeListener()等听众。

更新：

public class CenterDbController implements Initializable {

    public AnchorPane centerDbPanelPane;

    /** */
    public TextField txtSerialNo;
    public ComboBox<EModemModel> cbxModemModel;
    public Label lblRecordSize;
    public DatePicker dpStartDate;
    public DatePicker dpEndDate;
    public Button btnShow;
    public Button btnClear;

    /** */
    public TableView<RecordedTest> tblvRecords;
    public TableColumn colRecordId;
    public TableColumn colOfficeId;
    public TableColumn colCompany;
    public TableColumn colModemSerialNumber;
    public TableColumn colModemBrand;
    public TableColumn colModemModel;
    public TableColumn colSoftwareVersion;
    public TableColumn colAccessTest;
    public TableColumn colSoftwareTest;
    public TableColumn colDhcpTest;
    public TableColumn colWifiTest;
    public TableColumn colInternetTest;
    public TableColumn colResetTest;
    public TableColumn colTestResult;
    public TableColumn colSendStatus;
    public TableColumn colRecordDate;
    public TableColumn colTestDetails;

    /** */
    private IRecordedTestService recordedTestService;
    private FilteredList<RecordedTest> filteredList;

    @Override
    public void initialize(URL location, ResourceBundle resources) {

        initCellFactories();

        recordedTestService = UtilsForSpring.getSingleBeanOfType(IRecordedTestService.class);
        filteredList = new FilteredList<>(FXCollections.observableList(recordedTestService.getThisMonthRecords()), s -> true);
        tblvRecords.setItems(filteredList);
        lblRecordSize.textProperty().bind(Bindings.size(tblvRecords.getItems()).asString("%s"));
//        lblRecordSize.setText(filteredList.size() + "");

        filteredList.addListener(new ListChangeListener<RecordedTest>() {
            @Override
            public void onChanged(Change<? extends RecordedTest> c) {
//                lblRecordSize.setText(filteredList.size() + "");
            }
        });


        cbxModemModel.getItems().addAll(EModemModel.values());


    }


    private void initCellFactories() {

        colRecordId.setCellValueFactory(new PropertyValueFactory<RecordedTest, String>("recordId"));
        colOfficeId.setCellValueFactory(new PropertyValueFactory<>("officeId"));
        colCompany.setCellValueFactory(new PropertyValueFactory<>("company"));
        colModemSerialNumber.setCellValueFactory(new PropertyValueFactory<>("modemSerialNumber"));
        colModemBrand.setCellValueFactory(new PropertyValueFactory<>("modemBrand"));
        colModemModel.setCellValueFactory(new PropertyValueFactory<>("modemModel"));
        colSoftwareVersion.setCellValueFactory(new PropertyValueFactory<>("softwareVersion"));

        colAccessTest.setCellValueFactory(new PropertyValueFactory<>("accessTest"));
        colSoftwareTest.setCellValueFactory(new PropertyValueFactory<>("softwareTest"));
        colDhcpTest.setCellValueFactory(new PropertyValueFactory<>("dhcpTest"));
        colWifiTest.setCellValueFactory(new PropertyValueFactory<>("wifiTest"));
        colInternetTest.setCellValueFactory(new PropertyValueFactory<>("internetTest"));
        colResetTest.setCellValueFactory(new PropertyValueFactory<>("resetTest"));
        colTestResult.setCellValueFactory(new PropertyValueFactory<>("testResult"));
        colSendStatus.setCellValueFactory(new PropertyValueFactory<>("sendStatus"));

        colRecordDate.setCellValueFactory(new PropertyValueFactory<>("recordDate"));
        colTestDetails.setCellValueFactory(new PropertyValueFactory<>("testDetails"));

    }

    public void btnClearOnClickAction(ActionEvent e) {

        txtSerialNo.clear();
        cbxModemModel.getSelectionModel().clearSelection();
        dpEndDate.setValue(null);
        dpStartDate.setValue(null);

        filteredList = new FilteredList<>(FXCollections.observableList(recordedTestService.getThisMonthRecords()), s -> true);
        tblvRecords.setItems(filteredList);
//        lblRecordSize.setText(filteredList.size() + "");

    }

    public void btnShowOnClickAction(ActionEvent e) {

        if (dpStartDate.getValue() != null && dpEndDate != null) {
            filteredList = new FilteredList<>(FXCollections.observableList(recordedTestService.getBetweenRecords(dpStartDate.getValue(), dpEndDate.getValue())));
            tblvRecords.setItems(filteredList);
        }
    }


    public void tableOnSortListener() {


//        lblRecordSize.setText(tblvRecords.getItems().size() + "");
    }

    public void txtSerialNoOnKeyPress() {

        txtSerialNo.textProperty().addListener(observable -> {
            String filter = txtSerialNo.getText();
            if (filter == null || filter.length() == 0) {
                filteredList.setPredicate(s -> true);
            } else {
                filteredList.setPredicate(s -> s.getModemSerialNumber().contains(filter));
            }
        });
    }

    public void cbxModemModelOnValueChange() {

        String filter = cbxModemModel.getSelectionModel().getSelectedItem().toString();
        if (filter == null || filter.length() == 0) {
            filteredList.setPredicate(s -> true);
        } else {
            filteredList.setPredicate(s -> s.getModemModel().equalsIgnoreCase(filter));
        }
    }

}

Answer 1

Bindings class提供size方法，允许您为ObservableList的大小创建绑定。假设您修改现有列表，并且每次过滤时都不要用新列表替换它（例如使用FilteredList），您可以使用它来绑定Label文本：

// after assigning the items
lblRecordSize.textProperty().bind(Bindings.size(tableview.getItems()).asString("Record count: %s"));

修改

在您的代码中，您可以替换项目列表。 items未被替换的优先权没有给出......

您可以向item属性添加侦听器，并每次重新绑定Label文本

// before setting items the first time tblvRecords.itemsProperty().addListener((observable, oldItems, newItems) -> lblRecordSize.textProperty().bind( Bindings.size(newItems).asString()));

但是，您也可以修改单个列表以包含源数据，而不是每次都重新创建列表：

private final ObservableList<RecordedTest> data = FXCollections.observableArrayList(); private final FilteredList<RecordedTest> filteredList = new FilteredList<>(data); @Override public void initialize(URL location, ResourceBundle resources) { initCellFactories(); recordedTestService = UtilsForSpring.getSingleBeanOfType(IRecordedTestService.class); filteredList.setPredicate(null); data.setAll(recordedTestService.getThisMonthRecords()); tblvRecords.setItems(filteredList); lblRecordSize.textProperty().bind(Bindings.size(filteredList).asString()); ... } ... public void btnClearOnClickAction(ActionEvent e) { ... filteredList.setPredicate(null); data.setAll(recordedTestService.getThisMonthRecords())); }

如何在JavaFx中检测tableview项计数大小？

1 个答案: